The eProcurement Ontology provides the formal, semantic foundation for the creation and reuse of linked open data in the domain of public procurement in the EU.
Example 1: A hazardous material meets the defining criteria of Division 2.1 Flammable gas and Class 8 Corrosive material.
Answer 1: Division 2.1 Flammable Gas is higher on the list (3) than Class 8 Corrosive material (8). Therefore Division 2.1 Flammable gas is the primary hazard class and Class 8 Corrosive material is the subsidiary hazard class.
So, in this case, two a primary and a secondary hazard has to be described in the catalouge. Right now, this is not possible, as the cardinality of epo-cat:hasHazardousClass and epo-cat:hasHazardousItemUNDGCode is 0..1
Some goods may have more than one hazard:
Example taken from https://danielstraining.com/classification-of-a-material-having-more-than-one-hazard-49-cfr-173-2a/
So, in this case, two a primary and a secondary hazard has to be described in the catalouge. Right now, this is not possible, as the cardinality of epo-cat:hasHazardousClass and epo-cat:hasHazardousItemUNDGCode is 0..1
Proposed change
Change the cardinalities to 0..n